1. Department of Chemistry
2. Visva-Bharati University
3. Santiniketan-731235
4. India
5. Department of Zoology
6. Surface Physics and Material Science Division
7. Saha Institute of Nuclear Physics
8. Kolkata 700 064
9. Behala College
10. Kolkata 700060
11. Chemical Sciences Division
12. Kolkata-700064